Anti-overwinding protection device of mine hoist

Abstract

The invention discloses an anti-overwinding protection device for a mine hoist, which belongs to the technical field of mine hoists and comprises a working box, a hoisting box is arranged on the inner side of the working box, a steel wire rope is mounted above the hoisting box, and a buffer alarm assembly is mounted at the top of the working box and located on the outer side of the steel wire rope. Limiting lighting devices are installed on the working box and located below the buffering alarm assembly and obliquely above the two sides of the lifting box. A lifting buffering device is installed on the outer side of the bottom of the working box. According to the lifting box, by arranging the limiting lighting device, the lifting box can be limited through cooperation of an outer sleeve body, an inclined block and other structures when needed, so that the lifting box is prevented from falling, and the lifting box can be subjected to certain auxiliary lighting when needed; and therefore, the working requirements under different conditions are better met, and the working capability of the device is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of mine hoists, and particularly relates to an anti-overwinding protection device for mine hoists. Background Art

[0002] A mine hoist is a working machine underground and on the ground in a mine. Driven by an electric motor, mechanical equipment is driven to drive a steel wire rope, thereby driving a container to lift and lower in a shaft to complete the conveying task.

[0003] Chinese Patent Application No. 201922043554.0 discloses an anti-overwinding protection device for a mine hoist, including a working box. A support rod is fixedly connected to the outer top wall of the working box. One end of the support rod away from the outer top wall of the working box is rotatably connected to a pulley. A steel wire rope is wound around the outer wall of the pulley. The steel wire rope penetrates through the outer top wall of the working box and extends into the working box. One end of the steel wire rope located in the working box is fixedly connected to a lifting box. A protection plate in the shape of an isosceles trapezoid is arranged above the lifting box. Through grooves are formed in the left and right side walls of the working box. Both ends of the protection plate penetrate through and slide in the through grooves. The invention is provided with a warning light to inform the operator that the lifting box has risen to the limit height, prevent the steel wire rope from overwinding and shifting, damage mechanical components, avoid the crash of the lifting box, and at the same time, the contact end one and the contact end two are timely separated from contact through the second ejector rod, the driving power supply is cut off, and the rising of the lifting box is timely stopped, avoiding the occurrence of overwinding accidents.

[0004] 1. The above-mentioned disclosed patent has the problems that it cannot prevent the lifting box from falling when needed and cannot provide auxiliary lighting when needed, thus reducing the working ability of the device; 2. The above-mentioned disclosed patent has the problems that it cannot adjust the limit height that the lifting box can rise according to needs and cannot buffer the falling lifting box, thus reducing the practicability of the device. Summary of the Invention

[0005] To solve the problems raised in the above background art, the invention provides an anti-overwinding protection device for a mine hoist, which has the characteristics of high working ability and strong practicability.

[0006] To achieve the above object, the invention provides the following technical solution: an anti-overwinding protection device for a mine hoist, including a working box. A lifting box is arranged inside the working box. A steel wire rope is installed above the lifting box. A buffer alarm assembly is installed at the top of the working box and outside the steel wire rope. Limit lighting devices are installed on the working box at positions below the buffer alarm assembly and obliquely above both sides of the lifting box. A lifting buffer device is installed outside the bottom of the working box.

[0007] Preferably, the limit lighting device includes an electric telescopic rod, a moving frame, an outer casing, an inclined block and a compression spring. Electric telescopic rods are installed on the working box at positions below the buffer alarm assembly and obliquely above both sides of the lifting box. A moving frame is installed on the side of the electric telescopic rod close to the steel wire rope. An outer casing is arranged inside the moving frame, and an inclined block is arranged inside the outer casing. The outer casing and the inclined block are connected by a plurality of compression springs.

[0008] Preferably, the limit lighting device further includes screws. The moving frame and the outer casing are connected by two screws.

[0009] Preferably, the limit lighting device further includes lighting lamps. Lighting lamps are installed on both the upper and lower sides of the outer casing and on the side of the moving frame away from the electric telescopic rod.

[0010] Preferably, the outer shape of the moving frame is designed as a U shape, and the inner side of the outer casing is in close contact with the outer side of the inclined block.

[0011] Preferably, the lifting buffer device includes a bottom box, a reduction motor, a lifting plate, a guide rod and a lead screw. A bottom box is installed below the working box. A lifting plate is installed on one side of the bottom of the working box and below the electric telescopic rod. A reduction motor is installed inside the bottom box. A lead screw is installed above the reduction motor and inside the lifting plate. A guide rod is installed above the bottom box and on the side of the lead screw away from the working box.

[0012] Preferably, the lifting buffer device further includes dampers, a bearing plate and an elastic rubber frame. A bearing plate is arranged at the top of the bottom box and below the lifting box. An elastic rubber frame is installed between the outer bottom surface of the bearing plate and the inner bottom surface of the bottom box. A plurality of dampers are installed between the outer bottom surface of the bearing plate and the inner bottom surface of the bottom box and inside the elastic rubber frame.

[0013] Preferably, the lifting buffer device further includes a ventilation net. A ventilation net is installed on the bottom box at the position of the reduction motor away from the elastic rubber frame.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] 1. By setting the limit lighting device, the present invention enables the device to limit the lifting box through the cooperation of structures such as the outer casing and the inclined block when needed, thereby preventing the lifting box from falling. And the device can provide auxiliary lighting when needed, thus better meeting the working needs in different situations and further improving the working ability of the device.

[0016] 2. By providing a lifting buffer device, the present invention enables the device to adjust the height of the buffer alarm component through the cooperation of structures such as a reduction motor and a lifting plate when needed, thereby adjusting to a certain extent the maximum height that the lifting box can rise, and further improving the practicality of the device.

[0017] 3. By providing a lifting buffer device, the present invention enables the device to buffer the falling lifting box through the cooperation of structures such as a damper and an elastic rubber frame, thereby reducing the possibility of damage to the lifting box and further improving the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a perspective view of the present invention;

[0019] Figure 2 is a structural schematic diagram of the present invention;

[0020] Figure 3 is a structural schematic diagram of the limit lighting device of the present invention;

[0021] Figure 4 is of the present invention Figure 3 a cross-sectional view taken along the A-A direction in;

[0022] Figure 5 is a structural schematic diagram of the lifting buffer device of the present invention.

[0023] In the figure: 1, lifting box; 2, limit lighting device; 21, electric telescopic rod; 22, moving frame; 23, screw; 24, lighting lamp; 25, outer casing; 26, inclined block; 27, compression spring; 3, buffer alarm component; 4, steel wire rope; 5, working box; 6, lifting buffer device; 61, bottom box; 62, reduction motor; 63, ventilation net; 64, lifting plate; 65, guide rod; 66, lead screw; 67, damper; 68, bearing plate; 69, elastic rubber frame. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] Embodiment 1

[0026] Please refer to Figures 1-5, the present invention provides the following technical solution: An overwinding protection device for a mine hoist, including a working box 5, an elevating box 1 is arranged inside the working box 5, a steel wire rope 4 is installed above the elevating box 1, a buffer alarm component 3 is installed at the top of the working box 5 and outside the steel wire rope 4, and limit lighting devices 2 are installed on the working box 5 at positions below the buffer alarm component 3 and diagonally above both sides of the elevating box 1. An elevating buffer device 6 is installed outside the bottom of the working box 5.

[0027] Specifically, the limit lighting device 2 includes an electric telescopic rod 21, a moving frame 22, an outer casing 25, an inclined block 26 and a compression spring 27. Electric telescopic rods 21 are installed on the working box 5 at positions below the buffer alarm component 3 and diagonally above both sides of the elevating box 1. A moving frame 22 is installed on the side of the electric telescopic rod 21 close to the steel wire rope 4. An outer casing 25 is arranged inside the moving frame 22. An inclined block 26 is arranged inside the outer casing 25. The outer casing 25 and the inclined block 26 are connected by a plurality of compression springs 27.

[0028] By adopting the above technical solution, the device can limit the elevating box 1 through the cooperation of structures such as the outer casing 25 and the inclined block 26 when needed, thus preventing the elevating box 1 from falling, and better meeting the working requirements.

[0029] Specifically, the limit lighting device 2 further includes screws 23. The moving frame 22 and the outer casing 25 are connected by two screws 23.

[0030] By adopting the above technical solution, the staff can connect or separate the moving frame 22 and the outer casing 25 when needed, thus facilitating the loading and unloading of the moving frame 22 and its upper structures by the staff when needed.

[0031] Specifically, the limit lighting device 2 further includes lighting lamps 24. Lighting lamps 24 are installed on both the upper and lower sides of the outer casing 25 and on the side of the moving frame 22 away from the electric telescopic rod 21.

[0032] By adopting the above technical solution, the device can provide certain auxiliary lighting through the lighting lamps 24 when needed, so as to adapt to the situation of insufficient light such as cloudy days, and further better meet the working requirements under different conditions.

[0033] Specifically, the outer shape of the moving frame 22 is designed as a U-shaped design, and the inner side of the outer casing 25 and the outer side of the inclined block 26 are closely attached to each other.

[0034] By adopting the above technical solution, the normal operation of the moving frame 22 is ensured, and the gap between the inner side of the outer casing 25 and the outer side of the inclined block 26 is prevented, thereby preventing the inclined block 26 from swinging and deviating inside the outer casing 25.

[0035] When this embodiment is in use, when it is necessary to use the device to prevent overwinding protection for the operation of the mine hoist, the external mine hoist is manipulated to drive the steel wire rope 4 to pull the lifting box 1 upward. Under the extrusion of the lifting box 1, the inclined blocks 26 in the two limit lighting devices 2 both contract into the two outer casings 25 against the force of each compression spring 27. When the lifting box 1 completely passes through the two inclined blocks 26, the two inclined blocks 26 bounce back to their original positions under the action of each compression spring 27, thereby preventing the lifting box 1 from falling. Then, after the lifting box 1 contacts the buffer alarm component 3, the buffer alarm component 3 performs alarm and power-off operations, thereby performing overwinding protection. When it is not necessary to prevent the lifting box 1 from falling, the two electric telescopic rods 21 on the working box 5 are started, thereby driving the two moving frames 22 and the structures such as the screws 23 thereon to move, and then driving the two inclined blocks 26 to leave the lifting path of the lifting box 1. When needed, the staff can start the lighting lamp 24 for auxiliary lighting.

[0036] Embodiment 2

[0037] The difference between this embodiment and Embodiment 1 lies in that: the lifting buffer device 6 includes a bottom box 61, a reduction motor 62, a lifting plate 64, a guide rod 65 and a lead screw 66. A bottom box 61 is installed below the working box 5, a lifting plate 64 is installed at a position on one side of the bottom of the working box 5 and below the electric telescopic rod 21, a reduction motor 62 is installed inside the bottom box 61, a lead screw 66 is installed above the reduction motor 62 and inside the lifting plate 64, and a guide rod 65 is installed above the bottom box 61 and on the side of the lead screw 66 away from the working box 5.

[0038] By adopting the above technical solution, the device can adjust the height of the buffer alarm component 3 through the cooperation of the reduction motor 62 and the lifting plate 64 and other structures when needed, so as to adjust the limit height that the lifting box 1 can rise to a certain extent.

[0039] Specifically, the lifting buffer device 6 further includes a damper 67, a receiving plate 68 and an elastic rubber frame 69. A receiving plate 68 is arranged at the top of the bottom box 61 and below the lifting box 1. An elastic rubber frame 69 is installed between the outer bottom surface of the receiving plate 68 and the inner bottom surface of the bottom box 61. A plurality of dampers 67 are installed between the outer bottom surface of the receiving plate 68 and the inner bottom surface of the bottom box 61 and inside the elastic rubber frame 69.

[0040] By adopting the above technical solution, the device can buffer the falling lifting box 1 to a certain extent through the cooperation of structures such as the damper 67 and the elastic rubber frame 69, thereby reducing the possibility of damage to the lifting box 1.

[0041] Specifically, the lifting and buffering device 6 further includes a ventilation net 63, and the ventilation net 63 is installed on the bottom box 61 at a position on the side of the reduction motor 62 away from the elastic rubber frame 69.

[0042] By adopting the above technical solution, the reduction motor 62 can be ventilated and cooled to a certain extent through the ventilation net 63 on the bottom box 61, thereby reducing the possibility of overheating damage to the reduction motor 62 and ensuring the service life of the reduction motor 62.

[0043] When this embodiment is in use, when it is necessary to adjust the limit height of the lifting box 1 to rise, the reduction motor 62 in the bottom box 61 of the lifting and buffering device 6 is started, so as to drive the lead screw 66 to rotate. The lead screw 66 is threadedly connected to the lifting plate 64, and the lifting plate 64 is slidably connected to the guide rod 65. Therefore, the lead screw 66 drives the lifting plate 64 to move, and then drives the working box 5 and the buffer alarm component 3 to move, thereby adjusting the limit height of the lifting box 1 to rise. When the lifting box 1 falls onto the receiving plate 68, the damper 67 can cooperate with the elastic rubber frame 69 to buffer the impact, thereby reducing the possibility of damage to the lifting box 1. The ventilation net 63 plays a role in ventilating and cooling the reduction motor 62.

[0044] In the present invention, the structures and principles of the lifting box 1, the buffer alarm component 3 composed of a protection plate, a first ejector rod, a lamp box, a lower contact piece, a warning lamp, a buffer rod, a partition plate, a buffer spring, a second ejector rod, a second contact end, and a first contact end, the steel wire rope 4, and the working box 5 have been disclosed in a mine hoist overwind protection device with Chinese patent application number 201922043554.0. Its working principle is that when in the initial state, the first contact end and the second contact end are in contact, the driving power supply is energized to form a closed circuit to pull the steel wire rope, and the steel wire rope pulls the lifting box to rise. When the lifting box rises to a certain height, the top end of the lifting box abuts against the protection plate and pushes the protection plate to rise. When it rises to the warning height, the first ejector rod drives the lower contact piece to contact the upper contact piece of the warning lamp, and the warning lamp is energized to light up, informing the operator that the lifting box has risen to the limit height, preventing the steel wire rope from overwinding and shifting, damaging mechanical components, and avoiding the crash of the lifting box. At the same time, the second ejector rod timely lifts the first contact end to separate from the second contact end, cutting off the driving power supply and timely stopping the rise of the lifting box, avoiding the occurrence of overwind accidents.

[0045] In the present invention, the structure and principle of the damper 67 have been disclosed in a shock-absorbing device for a smart home washing machine with a Chinese patent application number of 201721446985.6. Its working principle is composed of a piston and an oil tank, which is filled with hydraulic fluid. When an object moves, the piston moves in the hydraulic fluid, thereby consuming energy and slowing down the movement of the object.

[0046] The working principle and usage process of the present invention: When it is necessary to use the device to provide over-winding protection for the operation of a mine hoist, operate the external mine hoist to drive the wire rope 4 to pull the lifting box 1 upward. Under the extrusion of the lifting box 1, the inclined blocks 26 in the two limit lighting devices 2 overcome the forces of the respective compression springs 27 and contract inward into the two outer sleeves 25. When the lifting box 1 completely passes through the two inclined blocks 26, the two inclined blocks 26 bounce back to their original positions under the action of the respective compression springs 27, thereby preventing the lifting box 1 from falling. Then, after the lifting box 1 contacts the buffer alarm component 3, the buffer alarm component 3 performs alarm and power-off operations, thereby providing over-winding protection. When it is not necessary to prevent the lifting box 1 from falling, start the two electric telescopic rods 21 on the working box 5, thereby driving the two moving frames 22 and the structures such as the screws 23 thereon to move, and then driving the two inclined blocks 26 away from the lifting path of the lifting box 1. When needed, the staff can start the lighting lamp 24 for auxiliary lighting; when it is necessary to adjust the maximum height of the lifting box 1 rising, start the reduction motor 62 in the bottom box 61 of the lifting and buffering device 6, thereby driving the lead screw 66 to rotate. The lead screw 66 is threadedly connected to the lifting plate 64, and the lifting plate 64 is slidably connected to the guide rod 65. Therefore, the lead screw 66 drives the lifting plate 64 to move, and then drives the working box 5 and the buffer alarm component 3 to move, thereby adjusting the maximum height of the lifting box 1 rising. When the lifting box 1 falls onto the receiving plate 68, the damper 67 can cooperate with the elastic rubber frame 69 to buffer the impact, thereby reducing the possibility of damage to the lifting box 1. The ventilation net 63 plays a role in ventilating and dissipating heat for the reduction motor 62.

[0047] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirits of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mine hoist anti-overwinding protection device, including a working box, characterized in that: A lifting box is arranged inside the working box. A steel wire rope is installed above the lifting box. A buffer alarm component is installed at the top of the working box and outside the steel wire rope. Limit lighting devices are installed on the working box at positions below the buffer alarm component and obliquely above both sides of the lifting box. A lifting buffer device is installed outside the bottom of the working box.

2. The anti-overwinding protection device for a mine hoist according to claim 1, characterized in that: The limit lighting device includes an electric telescopic rod, a moving frame, an outer sleeve, an inclined block, and a compression spring. Electric telescopic rods are installed on the working box at positions below the buffer alarm component and obliquely above both sides of the lifting box. A moving frame is installed on the side of the electric telescopic rod close to the steel wire rope. An outer sleeve is arranged inside the moving frame. An inclined block is arranged inside the outer sleeve. The outer sleeve and the inclined block are connected by a plurality of compression springs.

3. The anti-overwinding protection device for a mine hoist according to claim 2, wherein: The limit lighting device further includes screws. The moving frame and the outer sleeve are connected by two screws.

4. The anti-overwinding protection device for a mine hoist according to claim 2, characterized in that: The limit lighting device further includes a lighting lamp. Lighting lamps are installed on both the upper and lower sides of the outer sleeve and on the side of the moving frame away from the electric telescopic rod.

5. The anti-overwinding protection device for a mine hoist according to claim 3, characterized in that: The outer shape of the moving frame is designed as a U shape. The inner side of the outer sleeve is in close contact with the outer side of the inclined block.

6. The anti-overwinding protection device for a mine hoist according to claim 2, characterized in that: The lifting buffer device includes a bottom box, a reduction motor, a lifting plate, a guide rod, and a lead screw. A bottom box is installed below the working box. A lifting plate is installed on one side of the bottom of the working box and below the electric telescopic rod. A reduction motor is installed inside the bottom box. A lead screw is installed above the reduction motor and inside the lifting plate. A guide rod is installed above the bottom box and on the side of the lead screw away from the working box.

7. An overwind protection device for a mine hoist according to claim 6, characterized in that: The lifting buffer device further includes a damper, a bearing plate, and an elastic rubber frame. A bearing plate is arranged at the top of the bottom box and below the lifting box. An elastic rubber frame is installed between the outer bottom surface of the bearing plate and the inner bottom surface of the bottom box. A plurality of dampers are installed between the outer bottom surface of the bearing plate and the inner bottom surface of the bottom box and inside the elastic rubber frame.

8. A mine hoist overwind protection device according to claim 7, characterized in that: The lifting buffer device further includes a ventilation net. A ventilation net is installed on the bottom box at the position of the reduction motor away from the elastic rubber frame.

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